>>flavor+(OP)
Wow. The use case that comes to mind for me is when you take a big family photo (or 20) and someone inevitably ends up cut-off by accident.
So then you just feed RealFill the 20 pictures you took and your uncle is magically painted in.
>>Jorge1+3a
Also getting everyone smiling with their eyes open at the same time. Phone cameras could record a group photo for five or ten seconds and use the best expression from different times for each person.